Why doesn't Les try to make people switch denominations?
He does not try to move people from one denomination to another because the class is informal and not affiliated with any single group, reaching people across the whole spectrum. Instead, he wants them to get into the Book and learn to study it on their own, trusting the Holy Spirit to give wisdom and knowledge.
Les explains that the class is not affiliated with any one group; they have several different denominations in the studio, and Monty said he could pick out ten. Les says they just like to reach people across the whole spectrum and do not try to twist arms to get people out of one group into another. The goal is to get people into the Book and learn to study it on their own—not just read it, but study it—and as they study, the Holy Spirit will give wisdom and knowledge.